With machine running, slowly pour Kahlua in until it reaches a consistency similar to peanut butter but a bit wetter. Add powdered sugar, ¼ cup at a time, processing until mixture cleans sides of bowl. Refrigerate until ready to use.

Form into small balls, about one inch in diameter. Roll balls in additional finely ground Oreo cookie crumbs or powdered sugar. Alternately, the balls may be dipped in melted chocolate.